My daughter hurt her thumb last sun it didn't swell that day but has been all week now. Could it b broke & if so could a dr do anything now?

Not much. Most likely she did not fracture it she is able to move it without much pain. If just swelling and some pain, it is more likely contusion. Injury to fingers and toes typically hurts more the following days as infammation kicks in. If it hurts her a lot, get it checked...Maybe a finger splint may help..